NTSB: Four Bolts Were Missing From Alaska Airlines Jet

USA Today reports:

The National Transportation Safety Board issued a preliminary report into last month’s Alaska Airlines door plug blowout, saying evidence shows that four bolts were missing from the apparatus at the time of the incident.

According to the NTSB, “two vertical movement arrestor bolts, two upper guide track bolts, forward lower hinge guide fitting, and forward lift assist spring were missing and have not been recovered.”

The agency reports a lack of “damage patterns and absence of contact damage or deformation around holes” where the bolts should have been fastened.

Read the full article.